Berlin Blue

CSS

:root {
  --berlin-blue: #5588cc;
  --berlin-blue-rgb: 85 136 204;
  --berlin-blue-oklch: oklch(0.621 0.117 256.1);
}

.element {
  color: var(--berlin-blue);
  background-color: hsl(214 54% 57%);
  border-color: oklch(0.621 0.117 256.1);
}

Tailwind CSS v4

@theme {
  --color-berlin-blue: #5588cc;
  --color-berlin-blue-50: #e1f7ff;
  --color-berlin-blue-100: #d0eaff;
  --color-berlin-blue-200: #b6d6ff;
  --color-berlin-blue-300: #92b9f3;
  --color-berlin-blue-400: #6fa1e3;
  --color-berlin-blue-500: #4f87d2;
  --color-berlin-blue-600: #4373b1;
  --color-berlin-blue-700: #355c8f;
  --color-berlin-blue-800: #23446a;
  --color-berlin-blue-900: #182f4b;
  --color-berlin-blue-950: #081b31;
}

SCSS

$berlin-blue: #5588cc;
$berlin-blue-rgb: 85, 136, 204;
$berlin-blue-light: mix(#fff, $berlin-blue, 20%);
$berlin-blue-dark: mix(#000, $berlin-blue, 20%);

.element {
  color: $berlin-blue;
  box-shadow: 0 0 0 2px rgba($berlin-blue, 0.35);
}